Packing



Juile 4, 1929. A. .1. HAUG 1,715,597

PACKING Filed 0G13. l1, 1924 i ture f into the inner endof the annular cham- Vber 9 k'in which the blades 8 operate.

the ducts 18d, andthence throughlthe apeivv`v The two pumps thus are in series, theoutlet or' the pump having the blades discharging v i into the inlet ot' the pump which includes theblades `8. It, therefore, the screen should be operated at an abnormally low speed, or if for any reason liquid should force its way between the blades 8 and toward the aper-` V turek ,5 itwould'be met bythe air pressure created by the blades lO. i It willsbeiobserved that the blades l0 krotate in'a narrow annular chamber, asdo the blades 8, and the blades in each `case are ot substantially the same width as the chamber in which they Y revolve, vsuiicient clearance: only Vbeingiprovidedto allow the blades to run freely withoutl touching the walls of the chambers.:

Preferably the lblades 10 are grooved toco- Voperate Vwithan annular lbead oifiiange -Qf which.projects from thedisk lll parallel to vthe axis oi the shaft'l and facts asa trap, to,l

ing the liquid in the casing 2 down to a level i of thisliqui'd would Iflow into the chambers below the lower edge of thefaperture 5, some ofthe packing device.* Upon starting the machine againl there :would 'be .a tendency i'or some of this liquid to work axially away from thescreenand be thrown on adjacent machinery In: oi'der to provide fdr this condition, a ring 2O having a radial llangeis secured on the shaft 4 with its hub abutting against the ring 12', Vand it is encircled; by a stationary guard ringQl having a backwar'di 1y directedweb orbeading 22 at its inner edge This ring Qlissecured to the disk14bybo1ts.

" itwiiib@ evident. that anyiiquid 'which reachesthe rotaryring 2O will be thrownoutf wardly against the `stationary ring 21 .and Y suchfliquid will rfundown the thezwallsffof e the, latter ring toitsglowerside and wi'llesf cape through the orifice 24.

tion 1 provides ai, packing device Vwhich ,-will efl'ectually'prevent the e'scapelofr1 liquids from chinesf'lhis 'arrangement operates .with

rcomparatively little friction and it avoids entirelythe necessityfor the use ofrenewablepackings. Y' Y ,-3 .f

- lVhile Ihavehereinshown and described i, a `preferred embodimentofmyiinvention,` it

j lwill .be appreciated that the invention may bev einbodiedzin inany other vforms withoutde- Y parting from the spirit kvor scope thereof.

' -Having thus described my invention, whatY 'l V1...llhat improvement in themethed 'venting the leakageofliquifd throughfthe clearance space between the wallv of an aperture in a liquidcontainer and a rotary shaft projecting through saidv aperture, which conpressure created through the motion of said .,sists in opposing said leakage of liquid by shaft in the air immediately adjacent to said K clearance spacefandinfree communication therewith.V j l l '2. That improvement in the method ot pre venting the leakage of liquid through the clearance spacebetween the wall of ail-aperture in a liquid container and a rotaryshaft projecting through said aperture, which ,con`

sistsin opposing said leakageof liquidboth by pressure created through the motion ofV said shaftinthe air immediately adjacent to: i

said clearance space andin communication in the liquid tending to leak through;said

space, saidback pressure being created cen.-

therewith, and'also by' back pressure set up 1.

having an aperture through a wall thereon, a part proj ectnigthrough saidap'erture, said part and said container being relatively rotatable'and including members arranged toV form a narrow rannular chamber in ree'communication with theint'eriorof said container and into which vsaid aperture opens,`

andl series oi rotary blades mounted in said chamber and arranged to place.r a pressure,Y

1 on liquid tending to approachsaid*aperture to-'iorce it backwa-rdly into said container and to keep it away tromsaid aperture.

4l. The combination of a liquid container having an aperture through a wall thereof,

arotary lshaft projecting through saidA aper- Atn re,`a rotary device carried by said shaft' and mounted kwithin the container vfor treatmentfof the container contents, sai'd devicev and containerfhaving walls cooperatingtol ioo jiiorni an .annular chamber in. said container,

saidl chamber extending transversely to said shalt'aiid closely surrounding saidaperture,

and laseries of rotaryblatdes located in said chamber, saidfblades' being arranged to act `on kliquid adjacent to fsaidfapertureto force f i. i suchdiquid backwardly in'tosaidrcontainer Itfrwill nowbe understoodthat this invenandto keep v it away-'frein said aperture.v f 5. The combinationot a liquid-container a ,rotaryV shaft projecting through., said rapery n l e Y -having an aperturethrougha-wall'thereoi the casings or pulp'screening or other inature',` a rotary ,device carried by sai'd'shaft and mounted withinfthe container for treatment-ot the. container contents, said device Vvand:container 'having walls cooperating to Vforni an annular chamber inrsai'd container. f said chamber extend-ing jradi'ally away from I Y said shaftand closely 'surroundings'aidfaperf Y ture, and a seriesfof blades rotating withl said shattandlocated insai'd chamber,sai d'blades I beingV arranged 5to" forcewliquid' adj acent'" to said aperture-'backwardly into saidfcontainer andto keep-itawayfrom saidlaperture.

GjThecombinationof a liquid container pelao, *Y

having an aperture throughia wall thereof,

a rotary shaft projecting through said aper# A ture, a rotary device carried by said shaft and mounted within the container, tor treatment of the container contents, a seriesl of iinpeller blades rotating withjsaid shaft and located in the container closely adjacent to` said aperture, and parts forming a narrow chamber extending transversely to said shaft in which chamber said blades are located,

. 'said blades being operative to keep the liquid contents of the container away from said aperture. l

7. The combination of a liquid container having an aperture through a wall thereof,

a rotaryv shaft projecting through said aper ture, a rotary device. carried by said shaft and "mounted within the container, two circular series ot'blades rotating with said shaft andv located closely adjacent to saidaperture, and

parts providing narrow chambers in which said blades arelocated, the outer edge of yone chamber communicating withv the inner edge of the other chamber, onebf said chambersk beingarranged to receive liqu'id'tiowing 'from the container toward said aperture and the other chamber being open to the atmosphere,-

8. The combination otra liquid container having an aperturethrough a wall thereof, Aa

rotary vshaft projecting through said -aper I ture, and a packing for said shaft comprising` two rotary pumps mounted, respeCtive'ly,at the inner and outer sides of said wall close to said aperture, each of said pumps includnig'a s e'ries of blades rotating with said shaft and Y the outer pump communicating with the at-y inosphere and being arranged to dischargersA into the intake end of the inner pump. Y

9. The combination of'a liquid container -bladesvniounted, respectively, in-said chambers Aand each rotating with said shaft, the

inner set of blades 'being 'arranged to torce liquid inwardly away tromv said aperture and4 the outer set of blades being operative to force air inwardly Vthrough the aperture.

v lO. The combination of a liquidcontainer having an aperture througl'i a wall thereof, a

rotary shaft projecting through said aper- 7 ture, anda packing for said shattcomprising j parts arrangedto form two narrowannularYV y *Y chambers closely adjaCentto-and comm'unieating with the inner and 'outer' ends, respec' v tively, of said aperture,"two series of4 blades each rotating with said shaft, the inner setro blades being arrangedvv toforce'liquid linwardly away from said aperture Aand the outer set of vblades beiiigoperativeto vtorce air inwardly through theaperture, a ring having a radial tlangeextendiiig therefrom .and -Secured fast on said shaftroutside rofthe outer set of blades, and a stationary ring encircling said tian'ge.

l1.' The combination 'ot a liquidcontainer havingan aperture through va wallthereot, ra

lpart projecting throughfsaid aperture, said.

part and said container Vbeing `relatively rotatable, and a series ofvrotaryblades mounted in said container -for centrifugal action close Vlyadjacent to said aperture and extendingk away from the axis `oi rotation, said blades l being operative to placev arpressure on anyV liquid vtending toesca-pe through Said aper-V ture' to keep it awa'y'tron'iv said aperture vand 'torce it backwardly into said container.A

12. Thatimproveinent in methods ot'preventing leakage of liquid through theifcle'arance spacebetween the wall Otan aperture in a liquid container anda rotary shaft, projectr f :ing through saidaperture, which consists in actingcentrifugally on liquid tending to tiow outwardly through said space to forceitback' into the container, and acting centrifugallyr Aupon the air immediately `1outside otrand closely. adj acentto said aperture to urgeA itinwardly throughsaid aperture.A j i j v 13. The combination of a liquid-'container having an Aaperturethrough a wall thereof;

95 a rotary yshaft projecting through said ap,. erture; and a packingvtor saidsha'ft comprisj Y yingrtwo centrifugal pumps' inounted,'respec-V :y: f

tively, at tlie'ninner'and outer sides oitfsaidv wall'close tosaid aperture, cachot said pumps including 4a seriesv o t blades rotatingjwithf L said shatt,`theg inner vseriesot blades being".

arrangedtov act-ion liquid tending to escape..v 'i

into thecontainer, and-acasing cooperating with the outer pump to Atorina chamber' Vfor 1 said outer pump in'free communication'with j the atmosphere, said outer pump being opera-v tive to torce air radially awa-y from said Shaft, and Asaid casing serving to guide theair so acted upon linto said aperture, whereby the current ot air. assiststhe inner pumpv` in preventing the outwardtiowof liquid 'through sai'dfapertureL l 'AiiToN JgrifnAUGg i iiof; er

60 mounted,- respectively, in saidehambers and 

